Seudónimo Seudónimo

01-03-2016
Mathematics

contestada

If f(x) = x^3-2x^2 which expression is equivalent to f(i)

Respuesta :

apologiabiology apologiabiology

01-03-2016

remember that
i^2=-1 so

f(i)=i^3-2i^2
i^3=i^2 times i=-1 times i=-i

2i^2=2(i^2)=2(-1)=-2

f(i)=-i-(-2)
f(i)=-i+2

answer is -i+2 or 2-i

Answer Link

Otras preguntas

White southerners objected to black men voting, but seldom took any action to prevent it?

A(n) _______ is like a rockslide, but on a snow-covered mountain.

These reactions can also be reversed, breaking the large molecules into its individual molecules. what substance would need to be added in order to reverse the

Charles beard hypothesized that the constitution was produced by __________ in order to __________.

A puzzle contains a triangular piece with a base of 3 in. and a height of 4 in. A manufacturer wants to make 80 puzzles. Find the amount of wood used if each pu

Graph the linear function f(x) =3x+2 and find the maximum on the interval [-1,1]

Negative free cash flow does not automatically signal poor performance. a. True b. False

The tempature at 6:00 P.M. was 0°F. At midnight the tempature was 5° lower. By 6:00 A.M., the tempature was 4° lower than it had been at midnight. By noon, the

When a substance changes its state, all BUT ONE of these statements is true. That is A) Mass remains constant. B) Only the form changes. C) Kinetic energy ch

the elkwood aquatic society is working wirh various reptiles species to increase their populations. in their latest effort , the initial population of 450 endan